<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<body>
	这是一个新的网页,叫new2
	<div id="cli">点我返回</div>
</body>
<script type="text/javascript">
	console.log(history.length);
	cli.onclick = function(){
		// history.back();
		// 相当于两次back
		history.go(-2);
	}
</script>
</html>